Alright, let's work through 7145 times 1521 step by step
7145 × 1521 = 1521 × (7145)
+ 1521 × 5 what gives us 7605
+ 1521 × 40 what gives us 60840
+ 1521 × 100 that equals 152100
+ 1521 × 7000 yielding 10647000

= 10867545
